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Solving System of Equation by Substitution (simple substitution)

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Thread replies: 28
Thread images: 7
Solving System of Equation by Substitution (simple substitution)
I'm stuck in this one problem, it is :
x + y = 3
3y + x = 5
help
>>
>>767724265
x=2
y=1
But seriously how old are you?
>>
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>>767724265
>>
>>767724265
Are you 12?
>>
y = 3 - x

x = 5 - 3y
>>
>>767724555
x = .5
y = 2.5
>>
>>767724702
Is this bait or are you genuinely daft?
>>
>>767724555
>>767724702
stop doing his homework
>>
>>767724265
If x+y=3 then x has to be equal to 3 - y, that is x= 3 - y

Then you can substitute x in the other equation for 3 - y:

3y + x = 5
3y + (3 - y) = 5

Then:
3y + 3 - y = 5
2y + 3 = 5
2y = 2
y = 1

If y=1, x + y = 3 becomes
x + 1 = 3
So x has to be 2
>>
>>767724265
Inb4 underage b&
>>
>>767724265
post face
>>
>>767724265
Some anon has solved it. Now give us another, nigger.
>>
>>767724265
y = 3 - x
3y + x = 5
3(3-x)+x=5
9-3x+x=5
9-2x = 5
9-9 -2x = 5-9
-2x= -4
-2x/-2 =-4/-2
x = 2
I think
>>
>>767724265
>you must be at least 18 to post on this site
B&
>>
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>>767724265
>asking for homework help on something this simple
>underage b&
>pic related
>>
>>767724265
x = 3 - y
next equation

3y + 3 - y = 5
2y = 2
y = 1

other equation
x= 3 -1
x =2

you fucking retard at least learn how to google a website that does math for your dumbass
>>
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>>767727420
Why would I need to do that when 4 anon just did it for me free on here~
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>>767727885
Anon that was posted with the answer and there are free websites that will solve this for you. I’m saying your retarded ass needs to learn how to cheat because you damn sure won’t doing any middle school algebra
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>>767728207
>I’m saying your retarded
Tell me more about how retarded I am please. You probably don't realize it but you are providing entertainment for the hole thread.
>>
>>767728382
>can’t do math that 12 years old do
>can’t find a website that does calculations for you
>can’t even into English
I am insulting a middle school kid though so I don’t have much room to talk.
>>
>>767729059
Kek sorry bro I was masquerading as op in an effort to hone my "smug moron" trolling persona. What would you rate it?
>>
>>767729516
I was annoyed until I saw the bad English and remembered that I was a retard for helping a middle schooler with algebra. I give you a 6/10, gr8 b8 m8 no h8
>>
>>767727885
exactlo
>>
>>767729059
just got stuck on it, part of a review (not jhs). I could do every other problem but that one.
>>
>>767726526
I,,,,,m not bl ack
>>
>>767730803
https://www.symbolab.com/
There you go anon, my advice is read the parts where they help you solve the problem rather than just the answer.
>>
>>767730880
Do you think we should teach him what systems of equations like that actually represent? Either the algebraic or geometric intuitions?
Thread replies: 28
Thread images: 7


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